Performance of PRMA: a packet voice protocol for cellular systems

Nanda, Sanjiv; Goodman, D.J.; Timor, U.

doi:10.1109/25.97513

Cited by 429 publications

(217 citation statements)

References 11 publications

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“…The speaker alternates between talking and silent states with exponential durations, averaging 1 s and 1.35 s, respectively [18]. Packets are transmitted isochronously at a rate of 56 Kbps, consuming 87.5% of the bandwidth in the talking state, but only 37.5% of the bandwidth on average; the bandwidth fluctuates dramatically whenever the speaker changes state.…”

Section: Wired Servermentioning

confidence: 99%

Link Layer Adaptation for Shared Wireless Links

Xylomenos¹,

Makidis²

2008

Mobile Netw Appl

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Abstract-While traditional link layer protocols assume that they fully control the underlying link, in contemporary wireless networks the link may be dynamically shared by sessions belonging to different users and/or applications. To assess the impact of link sharing, we measure the File Transfer and Web Browsing throughput achieved over a Selective Repeat (SR) protocol, with or without contention from Media Distribution. Our results indicate that the optimal protocol settings strongly depend on the level of contention for the link. We therefore present two link layer protocols that adapt to the available bandwidth, our Adaptive Selective Repeat (ASR) protocol which dynamically modifies its retransmission timeouts, and the Radio Link Control (RLC) protocol specified for use by UMTS networks which does not employ retransmission timers. We first repeat our performance measurements to determine the optimal settings for each protocol, and then compare the fine tuned versions of all protocols with respect to their File Transfer and Web Browsing throughput, as well as to the delay induced to the contending Media Distribution packets. Our results indicate that while both RLC and ASR are more stable than SR, the complex RLC does not match the performance of our simpler ASR. Index Termsink Layer Protocols, Adaptive Selective Repeat, Radio Link Controlink Layer Protocols, Adaptive Selective Repeat, Radio Link ControlL

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Section: Wired Servermentioning

confidence: 99%

Link Layer Adaptation for Shared Wireless Links

Xylomenos¹,

Makidis²

2008

Mobile Netw Appl

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“…The subject of the integration of voice sources only and voice sources with data sources has been studied extensively [2]- [5] and the subject of voice/video and voice/video/data integration has also been studied, although less, in recent years [6], [7]. Our scheme is one of the first in the literature to study the integration of MPEG-4 and H.263 video streams.…”

Section: Introductionmentioning

confidence: 99%

Call-Admission-Control and Traffic- Policing Mechanisms for the Transmission of Videoconference Traffic From MPEG-4 and H.263 Video Coders in Wireless ATM Networks

Koutsakis

Paterakis

2004

IEEE Trans. Veh. Technol.

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Abstract-In this paper, we explore, via an extensive simulation study, the performance of a call-admission-control (CAC) and traffic-policing mechanisms proposed for transmitting multiple quality encoded videoconference movies over a wireless asynchronous transfer mode channel of high capacity, depending on the user's needs and requests. Both the CAC algorithm and the traffic-policing mechanism are novel mechanisms proposed for the first time in this paper. For their implementation, we use an estimation of the equivalent bandwidth of the movies, which has been introduced in the past. We focus on both MPEG-4 and H.263 coded movies, as the integration of such video streams has not been studied in the relevant literature. In the case of H.263 movies, our scheme achieves high aggregate channel throughput, while preserving the very strict quality-of-service requirements of the video traffic.Index Terms-Call-admission control (CAC), H.263 video, MPEG-4, traffic policing, wireless asynchronous transfer mode (ATM) networks.

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“…Thus apart from purely random access protocolS, a generic protocol cycle consists of a scheduling phase and a packet transmission phase (the former may itself be composed of some sub-phases). An important distinction can be made between single-cycle and multiple-cycle poliCies that span, respectively, only one protocol cycle (as in ETSI's HIPERLAN [2] or IEEE 802.11 's CSMNCA [10]) and many consecutive protocol cycles (as in PRMA [5] and token-passing protocols). Single-cycle poliCies can be further divided into contention-based and reservation-based; the former schedule one packet transmission per cycle, whereas the latter usually attempt to schedule more (an example is the CRT protocol [3]).…”

Section: Introductionmentioning

confidence: 99%

Packet Scheduling in Wireless LANs — A Framework for a Noncooperative Paradigm

Konorski

2000

Personal Wireless Communications

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Abstract:Contention-based packet scheduling policies incorporated into MAC protocols in wireless networks attempt to schedule one packet transmission per protocol cycle and are optimised to reduce the scheduling penalty while distributing the bandwidth fairly among the network stations. The paper points out the possibility of there being some noncooperative stations that, instead of adhering to a common-goal optimum policy, try to maximise their individual service rates to the detriment of the cooperative stations. A framework for noncooperative scheduling policies is postulated with analogies drawn from the auction paradigm; desirable features include verifiability at various levels, fairness and low performance cost. Upon discussing possible noncooperative station behaviour, four single-cyc1e noncooperative scheduling policies are proposed as modifications of the well-known EY-NPMA and Random Token policies. Results of a preliminary simulation study are presented to demonstrate that these modifications do prevent or at least discourage noncooperative stations from stealing bandwidth from cooperative ones.

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Performance of PRMA: a packet voice protocol for cellular systems

Cited by 429 publications

References 11 publications

Link Layer Adaptation for Shared Wireless Links

Link Layer Adaptation for Shared Wireless Links

Call-Admission-Control and Traffic- Policing Mechanisms for the Transmission of Videoconference Traffic From MPEG-4 and H.263 Video Coders in Wireless ATM Networks

Packet Scheduling in Wireless LANs — A Framework for a Noncooperative Paradigm

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